The planes in Ukraine fall mainly when hit by missiles

UK government sources say intelligence shows rebels deliberately tampered with evidence, moving bodies and placing parts from other planes in the debris.

The separatists must have a pretty unrealistically low opinion of Western investigators who surely have, y’know, some information about what to expect in terms of bits from a Boeing 777:

Investigator A: Sir, I’ve found the left propeller.Investigator B: This was a jet.A: I see…so I guess the fact that I’ve located the primary torpedo tube isn’t going to help either?B: …A passenger jet. So, to recap, the evidence we’ve gathered so far seems to be a tape recorder with ‘black bocks’ written on it, an effeminately-dressed mannequin with President Obama’s face, and the spoiler from a 1997 Renault Megane.A: Sir?B: Yes?A: Planes don’t normally have a snowplough with a Soviet flag on it, right?B: To be honest, son, I’m not even sure what a plane is any more.